You might want to suggest your GI to make a breath test for SIBO (small intestinal bacterial overgrowth). Normally there are some bacteria in small intestine, but when they overgrow, they produce gas and hence bloating.
If not bacteria in the small intestine, then it may be candida in the colon. I think that the same breath test would show this.
Anyway, you can do a sugar-free diet test for one week. No sugar (sweets, soda), fructose (fruits), maltose (beer), alcohol, and limited starch (potatoes, wheat). These are nutrients for bacteria/candida and when you starve them, they die. One week probably won't be enough for healing, but it may be a good experiment.
Thank you so much for giving me some ideas to go with. I was telling a coworker last night none of my doctors have suggested a bacterial infection. I never thought of fungal so I will bring up the breath test and other ideas you suggested at my appt. I don't drink alcohol and limit my sugar intact due to diabetes. Sometimes I am ready to start drinking though. It's interesting how when I sneeze, cough, blow my nose and eat/drink the feeling in my throat goes away for a few minutes. Doctors have all said probably is not sinus drainage or acid reflux since it gets better and goes away when I lay down. My poor family doctor just shakes his head and says this isn't normal. He did suggest dry throat but I would think that would be worse in morning from snoring and having my big mouth open when I sleep. I drink a lot of water so not dehydrated. Thanks again!